Actually, it was not possible to get enough data through the VK API to analyse it, but since most of the user profiles were open for everyone, it was not too complicated to parse them. You just need a good web developer and enough money on your AWS account.
The thing is - you cannot do the same with all the services that could give you much more data - YouTube, Sound Cloud, Apple Music, Spotify and etc. So you can actually forget about such a business model anywhere else.
What would you do in this case? We decided to use the same data source we had before but try to find a different type of customer, which we did successfully.